Z. Zulkifli, D. Purwanto, M. I. Sianto, and A. Saparia, “The Effect of Rubber Tire Modification Training on the Speed of the Sickle Kick of Naga Kembar Pencak Silat Athletes of Pasangkayu District”, IJoASER, vol. 9, no. 2, pp. 62-68, Jun. 2026.